The following statistics are from the Official Fallout 2 Strategy
Guide by Sybex:

ACB Nor Las Fir Pla Ele Exp

Leather Armor 15 25/2 20/0 20/0 10/0 30/0 20/0
Leather Armor Mk 2 20 25/3 20/1 25/1 10/1 40/1 25/1
Metal Armor 10 30/4 75/6 10/4 20/4 0/0 25/4
Metal Armor Mk 2 5 35/4 80/7 15/4 25/4 10/1 30/4
Combat Armor 20 40/5 60/8 30/4 50/4 50/2 40/6
Combat Armor Mk 2 25 40/6 65/9 35/5 50/5 55/3 45/9
Brotherhood Armor 20 40/8 70/8 50/7 60/7 60/6 40/8
Tesla Armor 15 20/4 90/19 10/4 80/10 80/12 20/4
Power Armor 25 40/12 80/18 60/12 40/10 40/12 50/20
Hardened Power Armor 25 50/13 90/19 70/14 50/13 50/13 60/20
Advanced Power Armor 35 55/18 90/19 70/16 60/15 60/15 65/20

ACB = Armor Class Bonus
Nor = Normal
Las = Laser
Fir = Fire
Pla = Plasma
Ele = Electricity
Exp = Explosion

Note that in the listings the #/# = DR/DT or Damage Resistance/Damage
Threshold.

I hope this answers the question.